EP0230764B1 - Dispositif pour le serrage de palettes - Google Patents

Dispositif pour le serrage de palettes Download PDF

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Publication number
EP0230764B1
EP0230764B1 EP86309934A EP86309934A EP0230764B1 EP 0230764 B1 EP0230764 B1 EP 0230764B1 EP 86309934 A EP86309934 A EP 86309934A EP 86309934 A EP86309934 A EP 86309934A EP 0230764 B1 EP0230764 B1 EP 0230764B1
Authority
EP
European Patent Office
Prior art keywords
clamp plate
pallet
work pallet
clamping
base block
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP86309934A
Other languages
German (de)
English (en)
Other versions
EP0230764A2 (fr
EP0230764A3 (en
Inventor
Eishin Satake
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tsudakoma Corp
Original Assignee
Tsudakoma Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tsudakoma Industrial Co Ltd filed Critical Tsudakoma Industrial Co Ltd
Publication of EP0230764A2 publication Critical patent/EP0230764A2/fr
Publication of EP0230764A3 publication Critical patent/EP0230764A3/en
Application granted granted Critical
Publication of EP0230764B1 publication Critical patent/EP0230764B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
    • B23Q1/28—Means for securing sliding members in any desired position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
    • B23Q16/02—Indexing equipment
    • B23Q16/04—Indexing equipment having intermediate members, e.g. pawls, for locking the relatively movable parts in the indexed position

Definitions

  • the present invention relates to a pallet-clamping device used for a machine tool such as a machining center. More particularly, the present invention relates to a pallet-clamping device for manually carrying out the operations of positioning and clamping a work pallet to a work table of a machine tool.
  • a pallet-clamping device for positioning and fixing a work pallet to the work table has been recently used together with a pallet-changing device for changing a work pallet on the pallet-clamping device.
  • An ordinary pallet-clamping device comprises a base block secured to a work table of a machining center or the like, a positioning unit for positioning a work pallet relative to the base block, and a clamping unit for clamping the work pallet to the base block, and these positioning and clamping units are automatically operated by an actuator driven by a drive source such as a hydraulic pressure, pneumatic pressure, or electric power.
  • this automatic pallet-clamping device a work pallet delivered onto the pallet-clamping device can be automatically positioned and fixed, and therefore, this automatic pallet-clamping device can carry out a very efficient exchange of work pallets between the pallet-changing device and the machining center or the like.
  • This type of pallet-clamping device is expensive, and is disadvantageous in that careful maintenance is necessary.
  • the pallet-clamping device is attached to the already existing machining center or the like, complicated wiring work must be carried out and thus the cost is increased.
  • a hydraulic pressure-generating device, a pneumatic pressure-generating device or the like must be provided, it is often difficult to later install such a device in a relatively small-sized factory.
  • a pallet-clamping device which comprises a base block secured to a work table of a maching tool; a positioning unit for positioning a work pallet relative to said base block, said positioning unit including at least one positioning pin movable between an engaging position where said positioning pin is engaged with a hole formed in said work pallet and a disengaging position where said positioning pin is disengaged from the hole of said work pallet; a clamping unit for clamping said work pallet to said base block, said clamping unit including a clamp plate movable between a clamping position where said clamp plate clamps said work pallet to said base block and an unclamping position where said clamp plate permits said work pallet to cove freely; an operating unit for simultaneously operating said positioning unit and said clamping unit, said operating unit including an operation shaft rotatably supported by said base block, a first connecting mechanism for operationally connecting said operation shaft with said positioning pin so as to cause the movement of said positioning pin between said engaging and disengaging positions by a rotational movement of said operation shaft,
  • the work pallet is subjected to a bending stress when used for clamping because whilst the clamping force acts on the centre of the work pallet, the clamping locations are at the four corners.
  • the present invention is characterised in that the clamp plate is provided with two rows of rollers arranged along sides thereof in a direction in which the work pallet is supplied, so that the work pallet is movably supported by the rollers; the work pallet is provided with two ribs which are located between the upper surface of the base block and the lower faces of the sides of the clamp plate, respectively; and that ribs are clamped against the upper surface of said base block by the lower faces of the sides of said clamp plate when said clamp plate is at said clamping position, but the ribs are movable in a space between the upper surfaces of said base block and the lower faces of the sides of said clamp plate when said clamp plate is at the unclamping position.
  • the tendency in the device of DE-C-882 828 for the work pallet to be subjected to a bending stress is overcome by the provision of the ribs which are clamped against the upper surface of the base block by means of the sides of the clamp plate. This ensures that the upper face of the work pallet is kept absolutely level to enable a precise working of a work piece.
  • a further problem occurs when the work pallet is manually delivered onto the pallet clamping device. Thus, if the delivery force is too strong, the work pallet tends to rebound and the subsequent clamping or positioning operation often becomes difficult.
  • GB-A-933 352 shows a latch unit for preventing rebound of a work pallet comprising a latch unit including a movable hook actuated by a stationary stop. That is actuation is automatic when the work pallet (referred to as a carriage) reaches a predetermined station.
  • the clamping device further comprises a latch unit for preventing a rebound of said work pallet when said work pallet is supplied onto said clamp plate, said latch unit including a movable hook supported by said base block and movable between a latching position where said movable hook is engaged with said work pallet so as to prevent the rebound of said work pallet and an unlatching position where said movable hook is disengaged from said work pallet.
  • the movable hook is manually actuated by means of the same operating lever which rotates the operation shaft to clamp the work pallet to the base block.
  • the hook is disengaged from the work pallet at the same time and by the same action as the clamping unit is released by the operating lever.
  • FIGS 1 through 4 show one embodiment of the pallet-clamping device according to the present invention.
  • the manual type pallet-clamping device has a base block 11 secured to a work table 1 of a work tool such as a machining center.
  • the base block 11 is secured to a desired position on the work table 1 by a stopper 12 and a clamping bolt 13.
  • the pallet-clamping device comprises a clamping unit 14 for clamping a work pallet 2 to the base block 11, a positioning unit 15 for positioning the work pallet 2 relative to the base block 11, a latch unit 16 for preventing a rebound of the work pallet 2, and a manual operation lever 17.
  • the clamping unit 14 includes a clamp plate 18 slidably mounted on the base block 11. As shown in Figs. 2 and 3, a pair of guide poles 19 extending downward are secured to the clamp plate 18, and the guide poles 19 are slidably fitted in a pair of guide holes 20 formed in the base block 11, respectively.
  • a plurality of rollers 21 are arranged on the clamp plate 18 in two rows along the direction in which the work pallet 2 is supplied. As seen from Fig. 1, the top faces of the rollers 21 are located above the top face of the clamp plate 18, and the bottom faces of the rollers 21 are located above the lower face of the clamp plate 18.
  • a pair of legs 3 and 4 are arranged on the lower face of the work pallet 2.
  • the legs 3 and 4 extend downward below the work pallet 2 and along the direction in which the work pallet 2 is supplied.
  • Ribs 3a and 4a extending inward are formed on the lower ends of the legs 3 and 4.
  • the clamp plate 18 can move in the vertical direction relative to the base block 11. When the clamp plate 18 moves upward, the clamping unit 14 is in the unclamping state. In this state, the rollers 21 abut against the lower face of the supplied work pallet 2 to support the work pallet 2.
  • the lower face of the clamp plate 18 is separate from and is located above the ribs 3a and 4a of the work pallet 2, and the lower faces of the ribs 3a and 4a are separate from the upper face of the base block 11 and located above the base block 11. Accordingly, the supplied work pallet 2 is smoothly guided by the rollers 21.
  • the clamp plate 18 moves downward, the clamping unit 14 is in the clamping state, and the ribs 3a and 4a of the work pallet 2 are clamped by the lower face of the clamp plate 18 and the upper face of the base block 11. In this state, the rollers 21 are separate from the lower face of the work pallet 2.
  • An operation shaft 22 extending in the direction orthogonal to the direction in which the work pallet 2 is supplied is rotatably supported on the base block 11, and a manual operation lever 17 is fixed to one end of the operation shaft 22.
  • an eccentric cam 23 is secured to the operation shaft 22, and a link lever 24 fitted with the eccentric cam 23 is pivoted on the clamp plate 18 by a pivoting pin 25.
  • the clamp plate 18 is displaced in the vertical direction together with the link lever 24 by the action of the eccentric cam 23, whereby the above-mentioned unclamping state and clamping state are alternatively reached.
  • the positioning unit 15 has a pair of positioning pins 26, and these positioning pins 26 are slidably fitted in a pair of boss portions 27 formed on the base block 11, respectively, and the boss portions 27 are freely fitted in a pair of holes 28 formed in the clamp plate 18, respectively.
  • a pair of positioning holes 2a, into which the positioning pins 26 can fit, respectively, are formed in the work pallet 2, and by engagement of the pins 26 with the holes 2a, the work pallet 2 is positioned relative to the base block 11.
  • a pair of cams 29 are arranged on the operation shaft 22 to move the positioning pins 26 in the vertical direction.
  • Figure 4 shows in detail an engagement structure of one of the cams 29 with the operating shaft 22 and with the corresponding positioning pin 26.
  • the cam 29 has a claw 30 to be engaged with a notch 26a of the positioning pin 26.
  • the cam 29 is rotatably fitted to the operation shaft 29.
  • a slit 29a extending in the circumferential direction is formed in the cam 29, and a pin 31 to be located within the slit 29a is mounted on the operation shaft 22.
  • the positioning pin 26 is fitted in the positioning hole 2a of the work pallet 2, and the manual operation lever 17 is located at the position indicated by A in Fig. 4. At this time, the clamping unit 14 is in the clamping state. If the manual operation lever 17 is turned counterclockwise in the drawings, the operation shaft 22 is rotated counterclockwise together with the manual operation lever 17 and the pin 31 is moved within the slit 29a. The cam 29 is kept stationary and, hence, the positioning pin 26 is also kept stationary, at the position indicated in the drawings. When the manual operation lever 17 is turned further, the cam 29 receives the action of the pin 31 and is rotated counterclockwise to push down the positioning pin 26. When the manual operation lever 17 is located at the position indicated by B in the drawings, the clamping unit 14 is in the unclamping state, and the positioning pin 26 is separate from the positioning hole 2a of the work pallet 2.
  • the latch unit 16 has a movable hook 32, and this movable hook 32 is rotatably supported through a pivoting pin 34 on a bracket 33 mounted on the base block 11.
  • the movable hook 32 has a stopper 35, and this stopper 35 can abut against a stationary hook 5 mounted on the end of the work pallet 2.
  • the position of the movable hook 32 can be changed between a latching position for engagement with the stationary hook 5 of the work pallet 2 (position C in Fig. 3) and an unlatching position for separation from the stationary hook 5 (position D in Fig. 3).
  • Two dents 32a and 32b are formed on the side face of the movable hook 32.
  • a ball (not shown in the drawings) that can be engaged with the dent 32a or 32b is held on the bracket 33 and urged toward the side face of the movable hook 32 by a spring, so that the movable hook 32 is held at the latching position C or the unlatching position D by engagement of the ball with the dent 32a or 32b of the movable hook 32.
  • the movable hook 32 When the movable hook 32 is located at the unlatching position D, if the stationary hook 5 of the work pallet 2 supplied onto the pallet-clamping device pushes the stopper 35 of the movable hook 32, the movable hook 32 is turned around the pivoting pin 34 and is changed to the latching position D, whereby a return of the work pallet 2, that is, a rebound of the work pallet 2, can be prevented.
  • a push rod 36 is slidably mounted on the base block 11 in the longitudinal direction so that the push rod 36 can abut against the movable hook 32.
  • An operation cam 37 that can abut against the push rod 36 is mounted on the operation shaft 22.
  • the movable hook 32 becomes engaged with the stationary hook 5 to prevent rebound of the work pallet 2. If the manual operation lever 17 is then shifted to the clamping position A from the unclamping position B, the positioning pins 26 are fitted in the positioning holes 2a of the work pallet 2 to locate the work pallet 2 at a predetermined position.
  • the clamp plate 18 is caused to press the work pallet 2 onto the base block 11 and clamp the work pallet 2, and by the action of the operation cam 37 and push rod 36, the movable hook 32 is returned to the unlatching position D from the latching position C.
  • the manual operation lever 17 is shifted to the unclamping position B from the clamping position A, whereby the clamping unit 14 is changed from the clamping state to the unclamping state and the positioning pins 26 of the positioning unit 15 are separated from the positioning holes 2a of the work pallet 2. Since the movable hook 32 of the latch unit 16 has been separated from the stationary hook 5 of the work pallet 2 at this point, after the manual operation lever 17 is shifted to the unclamping position B, the work pallet 2 can be immediately taken out from the pallet-clamping device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feeding Of Workpieces (AREA)
  • Jigs For Machine Tools (AREA)

Claims (4)

  1. Un dispositif pour le serrage de palettes comprenant:
       un bloc de base (11) fixé sur un plateau d'usinage (1) d'une machine-outil,
       un ensemble de positionnement (15) pour le positionnement d'une palette porte-pièce (2) par rapport audit bloc de base (11), ledit ensemble de positionnement (15) comportant au moins une goupille de positionnement (26) pouvant se déplacer entre une position d'engagement, dans laquelle ladite goupille de positionnement (26) est en prise avec un orifice (2a) formé dans ladite palette portepièce (2) et une position de dégagement, dans laquelle ladite goupille de positionnement (26) est dégagée de l'orifice (2a) de ladite palette porte-pièce (2),
       un ensemble de serrage (14) pour le serrage de ladite palette porte-pièce (2) sur ledit bloc de base (11), ledit ensemble de serrage (14) comportant un plateau de serrage (18) pouvant se déplacer entre une position de serrage, dans laquelle ledit plateau de serrage (18) serre ladite palette porte-pièce (2) sur ledit bloc de base (11), et une position de desserrage, dans laquelle ledit plateau de serrage (18) permet à ladite palette porte-pièce (2) de se déplacer librement,
       un ensemble de commande pour la commande simultanée dudit ensekble de positionnement (15) et dudit ensemble de serrage (14), ledit ensemble de commande comportant un arbre de commande (22) supporté, de manière rotative, par ledit bloc de base (11), un premier mécanisme de liaison (29, 30, 26a) pour relier ledit arbre de commande (22), en fonctionnement, à ladite goupille de positionnement (26), de manière à provoquer le déplacement de ladite goupille de positionnement (26) entre lesdites positions d'engagement et de dégagement par un mouvement de rotation dudit arbre de commande (22), et un second mécanisme de liaison (23, 24, 25) pour relier ledit arbre de commande (22), en fonctionnement, audit plateau de serrage, de manière à provoquer le déplacement de ladite plaque de serrage (18) entre lesdites positions d'engagement et de dégagement par le mouvement de rotation dudit arbre de commande (22);
       et un levier de commande manuelle (17) connecté à l'une des extrémités dudit arbre de commande, de manière que ledit arbre de commande (22) soit tourné manuellement entre une première position, dans laquelle ladite goupille de positionnement (26) et ledit plateau de serrage (18) se situent respectivement dans ladite position d'engagement et ladite position de serrage, et une seconde position, dans laquelle ladite goupille de positionnement (26) et ledit plateau de serrage (18) se situent respectivement dans ladite position de dégagement et ladite position de desserrage, caractérisé en ce que:
       ledit plateau de serrage (18) est pourvu de deux rangées de rouleaux (21) disposés sur des côtés de celui-ci, dans une direction dans laquelle ladite palette porte-pièce (2) est alimentée, de manière que ladite palette porte-pièce (2) est supportée, de manière déplaçable, par lesdits rouleaux (21); que ladite palette porte-pièce (2) est pourvue de deux nervures (3a, 4a) qui se situent entre la surface supérieure dudit bloc de base (11) et, respectivement, les faces inférieures des côtés dudit plateau de serrage (18); et que lesdites nervures (3a, 4a) sont serrées contre la surface supérieure dudit bloc de base (11) par les faces inférieures des côtés dudit plateau de serrage (18) lorsque ledit plateau de serrage (18) se trouve dans ladite position de serrage, mais que les nervures (3a, 4a) peuvent se déplacer dans un espace entre les surfaces supérieures dudit bloc de base (11) et les faces inférieures des côtés dudit plateau de serrage (18) lorsque ledit plateau de serrage (18) se trouve dans la position de desserrage.
  2. Un dispositif pour le serrage de palettes suivant la revendication 1, comprenant, en outre, un ensemble de verrouillage (16) destiné à éviter un rebondissement de ladite palette porte-pièce (2) lorsque ladite palette porte-pièce (2) est alimentée sur ledit plateau de serrage (18), ledit ensemble de verrouillage (16) comportant un crochet mobile (32) supporté par ledit bloc de base (11) et pouvant se déplacer entre une position de verrouillage, dans laquelle ledit crochet mobile (32) est en prise avec ladite palette porte-pièce (2), de manière à empêcher le rebondissement de ladite palette porte-pièce (2) et une position de déverrouillage, dans laquelle ledit crochet mobile est dégagé de ladite palette porte-pièce.
  3. Un dispositif pour le serrage de palettes suivant la revendication 2, dans lequel ladite palette porte-pièce (2) vient en butée contre ledit crochet mobile (32) lorsqu'elle est placée sur ledit plateau de serrage (18), de manière que ledit crochet mobile (32) est déplacé de ladite position de déverrouillage à ladite position de verrouillage, et dans lequel ledit ensemble de commande comporte un second mécanisme de liaison (36, 37) pour la liaison, en fonctionnement, dudit arbre de commande (22) audit crochet mobile (32), de manière que ledit crochet mobile est déplacé de ladite position de verrouillage à ladite position de déverrouillage lorsque ledit levier de commande manuelle (17) est tourné manuellement de ladite première position à ladite seconde position.
  4. Un dispositif pour le serrage de palettes suivant la revendication 4, dans lequel ledit second mécanisme de liaison comporte une came (37) montée de manière fixe sur ledit arbre de commande (22) et une barre de poussée (36) disposée de manière mobile entre ladite came (37) et ledit crochet mobile (32), ladite came (37) et ladite barre de poussée (36) étant disposées de telle manière qu'une force de poussée est exercée sur ledit crochet mobile (32) pour le déplacer de ladite position de verrouillage à ladite position de déverrouillage lorsque le levier de commande (17) est tourné manuellement de ladite première position à ladite seconde position.
EP86309934A 1985-12-27 1986-12-18 Dispositif pour le serrage de palettes Expired EP0230764B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP293283/85 1985-12-27
JP60293283A JPS62157754A (ja) 1985-12-27 1985-12-27 パレツトクランプ装置

Publications (3)

Publication Number Publication Date
EP0230764A2 EP0230764A2 (fr) 1987-08-05
EP0230764A3 EP0230764A3 (en) 1988-11-23
EP0230764B1 true EP0230764B1 (fr) 1992-09-30

Family

ID=17792824

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86309934A Expired EP0230764B1 (fr) 1985-12-27 1986-12-18 Dispositif pour le serrage de palettes

Country Status (4)

Country Link
US (1) US4738439A (fr)
EP (1) EP0230764B1 (fr)
JP (1) JPS62157754A (fr)
DE (1) DE3686877T2 (fr)

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DE3713022A1 (de) * 1987-04-16 1988-10-27 Schwaebische Huettenwerke Gmbh Palettenwechselvorrichtung
US4881727A (en) * 1987-08-06 1989-11-21 Joseph Deutsch Clamping mechanism
DE4005052A1 (de) * 1989-02-17 1990-09-13 Yamazaki Mazak Corp Aufspannvorrichtung fuer werkstuecke und spannvorrichtung fuer dieselbe
US5044616A (en) * 1989-11-21 1991-09-03 Jakob Tooling, Inc. Locating device for workpiece-processing apparatus
US5167405A (en) * 1991-08-21 1992-12-01 Midaco Corporation Fast change set-up device for work on work support
US5286148A (en) * 1993-03-15 1994-02-15 Midaco Corporation Table extender for a milling machine
DE9314483U1 (de) * 1993-09-24 1993-12-09 Maho Ag, 87459 Pfronten Vorrichtung zur lagefixierten Positionierung einer Palette auf einem Aufspanntisch
JPH08118175A (ja) * 1994-10-21 1996-05-14 Imao Corp:Kk 取付用ベース部材及びそのベース部材に取り付けられる取付具
DE19922086A1 (de) * 1999-05-17 2000-11-23 Hilti Ag Säge zum Schneiden von harten Materialien
IT1314336B1 (it) * 1999-12-29 2002-12-09 Omba S R L Paletta per il bloccaggio di un pezzo da sottoporre a lavorazioni
DE102005056449A1 (de) * 2005-11-26 2007-08-02 Alfing Kessler Sondermaschinen Gmbh Werkstückhaltevorrichtung und damit ausgestattete Bearbeitungsmaschine
US7975998B2 (en) * 2006-04-03 2011-07-12 Midaco Corporation Pallet changer and system and method for using the same
CN104070370B (zh) * 2013-03-25 2016-08-03 富泰华工业（深圳）有限公司 装夹装置
US20170326702A1 (en) * 2016-05-12 2017-11-16 Tsudakoma Kogyo Kabushiki Kaisha Rotary table device for machine tool
US10871507B2 (en) * 2018-12-20 2020-12-22 Texas Instruments Incorporated Semiconductor device handler with chuck clamp interlock
CN117465973B (zh) * 2023-12-27 2024-03-15 常州长盛机械有限公司 挖掘机用金属横梁切割成型用输送设备

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DE882828C (de) * 1944-02-01 1953-07-13 Luebecker Maschb Ag Feststellvorrichtung fuer fahrbare Spannvorrichtungen einer Fertigungsstrasse
US2672675A (en) * 1950-02-04 1954-03-23 Ralph E Cross Locating and clamping mechanism
NL269918A (fr) * 1960-10-04
JPS5438633U (fr) * 1977-08-15 1979-03-14
US4201284A (en) * 1978-11-02 1980-05-06 Brems John Henry Pallet registry system
JPS605417B2 (ja) * 1981-01-30 1985-02-12 本田技研工業株式会社 工作機械における治具台装置
JPS5822232U (ja) * 1981-08-04 1983-02-10 相生精機株式会社 工作機械へのクランプパレツト交換装置
IT8254037V0 (it) * 1982-12-07 1982-12-07 Comau Spa Dispositivo di riferimento e bloccaggio di un attrezzatura portapezzo in lavorazione sull attrezzo fisso di una macchina utensile
SE440618B (sv) * 1983-04-12 1985-08-12 Schedwin Sven Erik Fastspenningsanordning, i synnerhet for fastspenning av arbetsbord, fixturer eller liknande pa ett underlag, sasom maskinbordet i en bearbetningsmaskin

Also Published As

Publication number Publication date
JPH0523896B2 (fr) 1993-04-06
EP0230764A2 (fr) 1987-08-05
US4738439A (en) 1988-04-19
DE3686877T2 (de) 1993-02-25
DE3686877D1 (de) 1992-11-05
JPS62157754A (ja) 1987-07-13
EP0230764A3 (en) 1988-11-23

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